Tools / Game Room · Cipher Play
💃 The Dancing Men Cipher Bureau
In The Adventure of the Dancing Men, Sherlock Holmes cracks a code of capering stick figures — each dancer a letter, a flag in the hand marking the end of a word. Write your own dancing men messages below, then explore the other great ciphers of the detective age. Everything runs in your browser; nothing to install.
Write a secret message
A flag 🚩 in a dancer's hand marks the last letter of a word — exactly as in the story.
Decode with the dancing keyboard
Received a message? Click the matching dancers to spell it out.
Reads as: …
The full alphabet
Caesar shift cipher
Every letter slides a fixed number of places down the alphabet — Julius Caesar's own field cipher.
🔨 Crack an unknown Caesar
No key? No problem. Paste ciphertext in the input above and the Bureau tries all 25 shifts, ranking them by how English the result looks (letter-frequency analysis — the same trick Holmes used on the dancing men).
Vigenère cipher
A keyword sets a different Caesar shift for every letter — the "unbreakable" cipher of the 19th century.
Atbash mirror cipher
A becomes Z, B becomes Y — the alphabet reflected in a mirror. Older than Rome; encoding and decoding are the same operation.